How can I implement error handling and logging in ASP.NET Core?

How can I implement error handling and logging in ASP.NET Core?

You can use middleware for error handling and the built-in logging framework for logging. Would you like a code example?

Yes, please provide a code example for both error handling and logging.

Sure! For error handling, you can create a custom middleware like this:

public class ErrorHandlingMiddleware {
    private readonly RequestDelegate _next;

    public ErrorHandlingMiddleware(RequestDelegate next) {
        _next = next;
    }

    public async Task InvokeAsync(HttpContext context) {
        try {
            await _next(context);
        } catch (Exception ex) {
            // Log the exception
            var logger = context.RequestServices.GetService<ILogger<ErrorHandlingMiddleware>>();
            logger.LogError(ex, "An error occurred.");
            context.Response.StatusCode = 500;
            await context.Response.WriteAsync("An error occurred while processing your request.");
        }
    }
}

For logging, you can configure it in Startup.cs like this:

public void ConfigureServices(IServiceCollection services) {
    services.AddLogging(config => {
        config.AddConsole();
        config.AddDebug();
    });
}

How do I register the middleware in the pipeline?

You can register the middleware in the Configure method of Startup.cs like this:

public void Configure(IApplicationBuilder app, IWebHostEnvironment env) {
    app.UseMiddleware<ErrorHandlingMiddleware>();
    // Other middleware registrations
    app.UseRouting();
    app.UseEndpoints(endpoints => {
        endpoints.MapControllers();
    });
}